Add support for Atmel TPM devices with two wire interface.
Signed-off-by: NDirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: NReinhard Pfau <reinhard.pfau@gdsys.cc>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NAndy Fleming <afleming@freescale.com>